Microfluidic sensor based on integrated optical hollow waveguides

S Campopiano, R Bernini, L Zeni, PM Sarro

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A simple integrated optical refractometric sensor based on hollow-core antiresonant reflecting optical waveguides is proposed. The sensor uses the antiresonant reflecting guidance mechanism and permits one to measure the refractive index of a liquid filling the core by simply monitoring the transmitted spectrum. The device has been made with standard silicon technology, and the experimental results confirm numerical simulations performed in one- and two-dimensional geometry. The sensor exhibits a linear response over a wide measurement range (1.3330-1.4450) and a resolution of 9×10^-4 and requires a small analyte volume. © 2004 Optical Society of America
Original languageUndefined/Unknown
Pages (from-to)1894-1896
Number of pages3
JournalOptics Letters
Issue number5
Publication statusPublished - 2004


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